Comcent-batob



to be shaken from among the nuggets which will be entrapped in the pocket '29 beneath the false floor member 22. Attention is directed to the fact that the false ioor member 21 is a short one tending to receive the ganglio which has not passed through the p'e'rforations 24, and to lift all 'of this ganglio 'oil of the main floor 20. A trap opening 30 is formed between the rear end of the floor men'iber 21 and the forward end` of the fioor member 22, and through ,this slotted passageway a heavy material, such as nuggets of the vmetal, may .pass and wlll accumulate in the pocket 29. For convenience, the floor member 21 is pivoted to the table at 31 and the fioor member 22 is pivoted to the table on vthe pin indicated at 32. i

The table is given an oscillatory vibration by means of a bell crank 33 suitably mounted for horizontal swinging' movement on the frame 10 and'carry'ing a pitman rod rod 34 secured to the forward end of the table 16. 'lhe other arm of the bell crank is connected. with an operating.cable 35 to a crank disk 86, by the rotation of which oscillation `of the ell crank -is effected. Any suitable means may. be used to vary the eccentricity of the bolt 37 carried by the disk 36. This disk is mounted upon a shaft .3S journaled in bearings 39 and 40 secured to the trame. Between these bearings a pulley 41 is provided todrive the shaft. A universal coupling 42 connects the shaft 38 with the shaft 43 disposed at an inclination to th l horizontal and supported by bearings 44. This shaft carries a cone pulie 46 for driving;r the mechanism shown in igs. 6 and 7 of-the drawings, and to be herelnafter described.

The concentra-tor table 26 which is disposed beneath the shaker table 16 is of pecuiiar construction and diifers from the shaker table previously described.' The shaker table is preferably' fformed of sheet metal while the floor of 'the concentrator table is peculiarly constructed by the arrangement. of aY 4 plurality screens and cloth partitions. i

Referringiparticularly to Fgs.`4, 5 and' 6 of the drawings, it 'will be seen that theV -face of the .frame member 47 and'normally rest on the gasket strips 48. stretched across the tops of the bars 50 is the main floor of the consenti-alter table 26 which comprises an upper layer of cloth 51 and a lower layer of screen 52 disposed in close proximity to each other and in spaced relation to the cloth partition member 48.

It will thus be evident that a compartment ported in a manner to permit slight vertical movement of the bars 50 relative to the frame. This movement will, of course, be accompanied by the complete movement of the floor structure previously described.

Fastened to the bars 50 and. over the to of 80 the cloth floor member 51 are rilile ars 53. These bars may be formed of any material desired, although metaliis preferable due to the wearing qualities.

By reference particularly to Fi 4,

will be seen that the bars 50 and t e'riiiie bar s 53 which are directly superposed thereover, are not disposed in direct lateral alignment with relation to the longitudinal axis of the concentrator table, but are disposed at an inclination. In the present instance this is sixty degrees,A although under varying'r conditions the table may be designed with riile bars disposed at different angles. p In Athe upper left hand corner of the concentrator table as shown in Fig'. 4, the triangular portion 54 occurs. This portion lof the table has a solid fioor 55 disposed bencsh the coverings 51 and 52 as shown in Fig. 5. intervals through the solid floor 54 for directing jets of air through the members 51 and Inthe lower right hand corner of Fig. 4, it will be seen that a triangular por.-

tion 56 is provided. This is solid and is 105 set ofi from the main body of the concentrator table by a. partition Wall 57. A valve opening 58 1s formed through the solidfioor member and is normally closed'by a dapper valve 59 held in close' position by no l air pressure exerted from beneath the table.

This air pressure is created by the pro.Y

vision of a false Hoor'GO within-the'z'rale"V member 47 of the concentrator table and beneath the table structure embodying the cloth partition`48, and thecloth and wire members 51`and 52. The false floor is positioned to pivot along one edge of the frame and to be oscllated by driving mechanisms 61 and 62 which receive theirA ower `from the pulley 46, and driven by a be t 63. Each of the driving mechanisms comprises a crank disk 64, and a pitman rod 65. The free end of the rod is connected to a bearing carried bythe free edge of the fioor 60 so 125 vthat the. door may move vertically as it is confined between its pivot oint and an arcuate member 66 dispose within the frame 47. A trap valve 67 is formed in the false floor member 60 so that on the downu Openings 55 are formed'at W0 varying' conditions so that a mechanism for the recovery of :L desired metal may he obtained.

While I have shown` the preferred form of my invention as now known to me, it is to be understood that various changes may be mede in its construction without departing from the invention es defined in the appended claims. f

Having thus described iny invention, what I claim and desire to secure by Letters Putent is 1. In an ore coneentrator, a. concentrator table. and pncumatically operated Ineens adapted to mechanically maintain gangue supported on the table in a condition of disturbance by bodily vibrating the table and to act by pneumatic force to directly disturb pneumatically the particles of gangue and effect their separation.

2. An ore conoentrator comprising a. shaker table onto which gungue is delivered, a concentrator table disposed therebeneath to receive the sifted gemene from the shaker table, and pneumatic means einbodied in concentrator table to bodily vi-v brate the floor of the table and for directly forcing air into the gengue thus separated to disturb the particles. thereof and effect their separation.

3. In an ore concentrator, u concentrate ore table disposed at an angle. to the horin zontel diagonally corner to corner whereby one end and an adjacent side are higher than the corresponding opposite end and adjacent ride` a floor in said table. riflle bars disposed across the iloor iin spared relation to each other, and pneumatic means for bodily vibrating the t-ahle and for directly acting: upon the ganglio supported by the table to cause the gangue to move towards the lower corner of the fable and the metals to be recovered to move towards the higher edge of the table. I,

In an orc coneentrator, a` concentrate ore table disposed at an angle to the horizontal diagonally corner to corner whereby one end and :in adjacentside are hifher than the corresponding opposite emi nd adjacent side. a, Hoor in said table, rile bars disposed across the floor in spaced relation to each other, pneumatic means for bodily vibrating the table and for directly acting upon the langue supported by the. table to cause the geneve to move towards the lower corner of the table and the metals to he recovered to move towards the higher edge of the table. and ine-ans for eontixur ously drawing oli'l the recovered metals us they reach the higher edge of the table.

5. In an ore concentrator, a. concentrator table comprising a floor formed of a femur inous sheet of material, a second floor meinber spaced therefrom and therebeneath und also formed of a foraminous sheet of material7 ritlie bars directlyY secured upon the,

upper face of the upper sheet of materiel-` one ot' the floors being; loosely mounted und means for passingP e uniform column of air through the complete door structure to heilt ly vibrate the loosely mounted floor und' to directly not upon the ganglio supported thereon.

6. In an ore roneentrator, a' concentrutor table comprising a floor formed of u foruminous sheet of materiel, aA second floor member spaced therefrom and therebencath and also formed ot a. foremino'us sheet of material, riiile bars directly secured upon the upper face of the upper sheet of material, the upper Hoor being loosely mounted, means for passing :i uniform column of air through the complete iloor structure to bodily vibrate the upper 'ioor and to directn ly act upon the ganglio supported thereon, end means whereby said pneumatic action will cause the gangue to more lenethwisc of the table und the recovered metal to he separated from the gang'uehnd to move lat erally of the table.

7. An ore concentrator comprising a mein frame, a shaker table supported at the top thereof for vertical swinging movement, mechanical ineens for actuating said table, e, concentrator table disposed directly he neath said shaker table und adapted to ro ceive the sifted ganglio from the shelter table, and pneumatic means for bodily nette ating' the coneentralor table to seperate the sifted gunejue and the metal particles can ried thereby.

JHN H. lNIACARTNliY. 

